Ruby - Break Statement
The break statement in Ruby is used to terminate the program out of the loop containing it whenever the condition is met.
If the break statement is used in a nested loop (loop inside loop), it will terminate innermost loop after fulfilling the break criteria.
Break statement with While loop
In the example below, break statement is used to get out of the while loop if the value of variable j becomes 4.
j = 0 while j < 10 do j = j + 1 if j == 4 puts "Getting out of the loop." break end puts j end
The output of the above code will be:
1 2 3 Getting out of the loop.
Break statement with For loop
Here, the break statement is used to get out of the for loop if the value of variable i becomes 4.
for i in 1..6 if i == 4 puts "Getting out of the loop." break end puts i end
The output of the above code will be:
1 2 3 Getting out of the loop.
Break statement with Nested loop
The Break statement terminates the inner loop whenever condition is fulfilled. In below mentioned example, program terminates the inner loop only when j = 100 (resulting the program to skip the inner loop for j = 100 and 1000).
#Nested loop without break statement puts "# Nested loop without break statement" for i in 1..3 for j in [10, 100, 1000] puts i*j end end
The output of the above code will be:
# Nested loop without break statement 10 100 1000 20 200 2000 30 300 3000
#Nested loop with break statement puts "# Nested loop with break statement" for i in 1..3 for j in [10, 100, 1000] if j == 100 break end puts i*j end end
The output of the above code will be:
# Nested loop with break statement 10 20 30